This author found no literature regarding typographic style for Hebrew texts intended for novice Hebrew readers. However, it is reasonable to expect that the typographic style issues for novice readers in other languages may be generalized, since much of the research and guidelines center on the issues of layout, spacing and typeface features. A search on the topic of typography for children revealed a moderate bibliography published at the web site www.kidstype.org, the web site for the Typographic Design for Children Project at the University of Reading in Reading, England. (As of this writing in 2019, it seems that this web-site has been replaced with this one at University of Reading's web site.)
In 2009, Sue Walker was the project leader and Head of the Department of Typography & Graphic Communication there. Their web site contained information about "what children thought about particular typefaces and how they described them, and whether they noticed and could describe variations in letter, word and spacing." (Walker, "Typography in Children's Books", on-line article)
Walker's findings showed that children do not necessarily find reading tasks easier or harder with serif or sans serif fonts. Teachers seemed to prefer sans serif fonts "because of the simplicity of the letter shapes". Moreover, it seemed that children's typeface preferences influenced their motivation to read. Children seemed to prefer "reading things that look familiar or 'normal'".
Varying letter and word spacing revealed that children can usually detect changes in letter spacing and generally prefer wider spaces between letters. Changes in word spacing produced varied responses from children, but approximately half of the respondents thought that tighter word spacing was easier to read. In general, children preferred wider spacing between lines, but they couldn't always identify the wider line spacing as the reason why they thought a text was easier to read.
In her article "Typography for Children", Ilene Strizver provided guidelines for text legibility that are general enough to be applied to any alphabetic font. She advocated using fonts with counters (the enclosed shapes within characters, such as the inner area of the letter 'b') that are rounded and open, rather than angular. The presence or absence of serifs is not important. The font should not be too condensed, too wide, too bold or too hairline in nature. Spacing between lines should be adequate enough to allow the reader's eye to migrate easily from the end of one line of text to the beginning of the next. Lines should be kept short and no page should have too much text. She recommends at least four to six points of leading (the distance between two baselines of lines of type). It should be noted that this suggestion is based on English (L1) texts for English (L1) readers.